Warm Tips: Bluetooth Paring Guide: (if you see blue blinking light, please do not release, keep pressing the button till the blue light shows constantly and not blinking.) 
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<br />A.For your first use, please long press the answer/end button about 15-20 seconds till the indicator Light shows Blue constantly and not blinking (if you see blue blinking light, please do not release, keep pressing the button till the blue light shows constantly and not blinking.) 
<br />B.Set the phone to search for this bluetooth device which named as:HV-800 
<br />C.Repeat the steps if the pairing was failed. 
<br />D.If the paring is successful, you'll find that the Blue indicator light flash slowly, which means that the headset is in standby mode ready to make/receive calls. 
<br />E.Normally,you only have to do the above steps once in first use. 
<br />F.If you find that the headset not work properly, do not worry. Please check the headset to see whether it is full charged, sometimes it may not work because of low power. Any other problem, please feel free to contact us via ebay message, our custom service will help you to solve it. Thanks and welcome to buy! 
<br />G. when the battery fully charged, the Charging indicator lights will shut out.
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<br /> Specifications:
<br />1. Bluetooth Version: Buletooth 3.0 + EDR, wireless transmitter standard of class II
<br />2. Frequency Coverage: 2.402~2.480GHz ISM band
<br />3. Sensitivity: -80dbm
<br />4. Transmit Range: up to 10m
<br />5. Transmit Speed: 57~723Kbps
<br />6. Stereo Compression Ratio: 44.1/ 48kHZ
<br />7. Channel: 79 channels of 1MHz, B/W
<br />8. Contact Terms: Point-to-Point
<br />9. Battery: Built-in Rechargable Li-ion Battery
<br />10. Charge Power : PC USB, 5V
<br />11. Charging Time: 1-2 hours
<br />12. Stand By Time: 4 days
<br />13. Working Time: 4-6 hours
<br />14. Color:Black, Blue, Green and Red
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<br />Compatible Models:
<br />All of devices which have the Bluetooth Function, such as Smartphone Tablet PC, Laptop, PSP, TV, Computer, etc. 
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<br /> What is included:
<br />1 x Sports Bluetooth Headphone
<br />1 x Mini USB Cable for charging